I have to have a dental bridge fitted soon - for one missing tooth at the side?

This will be connected to a crown. How long is this likely to last before it needs replacing?

I have to have a dental bridge fitted soon - for one missing tooth at the side?
that nearly impossible 2 say caz it also depends on how well u look after it and floss the bridge but if u do look after it and keep up check up u could easy have it for 20 yrs